Saw-set



J HILTON. 2 SheetsSheet 1 SAW SET.

(No Model.)

No. 411,893. Patented Oct. 1, 1889.

2 Sheets-Sheet 2. J. HILTON. SAW SET.

(No Model.)

No. 411,893. Patented Oct. 1, 1889.

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UNITED STATES PATENT UEEicE.

JAMES HILTON, OF NEXVARK, NEW' JERSEY.

SAW-SET.

SPECIFICATION forming part of Letters Patent No. 41 1,893, dated October1, 1889. Application filed November 13, 1888- Serial No. 290,722. (Nomodel.)

To aZZ whom, it may concern.-

Be it known that I, J AMES HILTON, a citizen of the United States,residing at Newark, Essex county, New Jersey, have invented certain newand useful Improvements in Saw-Sets, fully described and represented inthe following specification and the accompanying drawings, forming apart of the same.

This invention consists in the construction herein described andclaimed.

The invention will be understood by reference to the annexed drawings,in which- Figure l is a side elevation of the apparatus without themandrel-carrier or circular saw, and Fig. 2 is a plan of the same. Thehandleveris removed from the trip in Fig. 2 and is broken off in Fig. 1for want of room upon the sheet. Fig. 3 is aside elevation, upon asmaller scale, of the apparatus provided with the mandrel-holder andconnected with a foot treadle. Fig. 4c is a plan of the mandrelholder,with dot-ted lines showing a change of adjustment; and Fig. 5 is an edgeviewof the same, with the mandrel and its attachments shown in sectionon line a: :0 in Fig. l. Fig. 6 is an end View, and Fig.7 a side view,of the anvil detached.

The parts may be mounted upon any suitable frame, but are shown in thedrawings attached to a cast-iron bed a, provided with a fulcrum-bearingb, a gage c, a lug d, for the attachment of the saw-holding devices, anda bearing f for the hammer-trip. An anvil e is held reinovably againstthe gage c by a set-screw c and a guide 72 rabbeted upon its under sideto fit narrow saw-blades, is shown resting upon the top of the anvil andclamped upon the lug (Z by thumb-screw i.

The setting-hammer consists in a disk D andhelve I, pivoted upon thefulcrum-bearing b and provided with a lever J, projected in the rear ofthe bearing and actuated by a trip Z. The latter consists in an armpivoted upon a pin m, projected through the tripbearing fiand isprovided with a slot at, fitted to such pin to render it adjustable toand from the trip-lever J The arm of the trip Z is shown constructedwith a fork Z in Fig. 2, to embrace the upper end of the bearing f, anda spring 0 is atfixed to the bed a and fitted inside the fork Z to pressthe end of the trip normally toward the end of the lever J.

Ahand-lever P is shown fitted in a hole p in the triparm and projectedtoward the anvil e. A downward pressure upon the handlcver operates torotate the trip-arm around the pin on in an are indicated by the dottedsegment m and the engagement of the trip with the rear end of the leverJ operates to depress the end of the lever and to raise the hammer-headD until the curved movement of the trip disengages it from the lever.

A spring q is applied to the hammer-helm I to draw the helve downward,and the disk D is thus thrown forcibly toward the anvil when the lever Jis released from the trip. The end of the trip is formed as a pawl,sloped upon the upper side, and the end of the lever J is sloped uponits under side, so that the trip, when lifted after pressing the leverdownward, may by the contact of the sloping surfaces be pushed backwardin opposition to the spring 0 to engage again with the upper side of thelever.

An eye is formed in the rear end of the tripatrm, and a screw, as s,inserted through the same into contact with the bearing f, and operatesin opposition to the spring 0 to adjust the point of the trip to andfrom the lever J'. Such adjustment varies the point at which the tripdisengages with the arm, and thus enables the operator to adjust thelift of the hammer and the force of the blow delivered by the head Dupon the saw-tooth lying upon the stake.

The anvil, as shown in Fig. 6, is beveled in different degrees upon itsfour corners, and may be turned with any of its corners adjacent to thegage c. The gage operates, as shown in Fig. 2, to set the points of theteeth even with the flat side of the anvil, so that the root of thetooth bears upon the inner corner of the bevel, as shown in Fig. 6, andthe disk D thus operates in all cases to bend the tooth down to theutmost degree that the bevel will allow. In Fig. 22 teeth upon thesaw-blade g are shown in contact with the gage c, and a groove is shownupon the under side of the guide h to fit over the rear edge of theblade, and thus hold it close to the gage, while permitting freelongitudinal movement.

To set the teeth in the sawblade, the operator slightly raises thehammer-head (consisting in the disk D) by pressing upon the handlever P,so as to permit the shifting of the blade with the proper tooth beneaththe hammer. The proximity of the hammer-head guides the eye of theoperator so accurately that the required tooth may be readily placedbeneath the hammer upon the anvil, and the use of any gage to set thesaw-blade longitudinally is thus wholly avoided. The handlever P is thendepressed slightly to raise the hammer through the desired arc andrelease it, the spring then throwingit down upon the tooth and settingthe same, as desired.

The pitch of the teeth of different sawblades varies greatly, and itwould be necessary if a tooth-gage were used to adjust such gage insetting eac h saw; but by utilizing the edge of the hammer to guide theeye of the operator the proper tooth may be adjusted beneath the hammerwith sui'ficient accuracy and the manipulation of a tooth-gage be whollyavoided.

By the use of the treadle both hands of the operator may be set atliberty and used to support a large saw-blade of straight or circularform.

The guide It is chief] y useful in setting the teeth of band-saws,which, by reason of their length and elasticity, are liable to springaway from the gage c.

The lug d is extended outward from the anvil at a level with the top ofthe same and operates to support wider saw-blades, which would beaccommodated by wholly removing the guide 77, and its thumb-screw.

In Fig. 3 the saw-set is shown mounted upon a table T, and a treadle aconnected with the trip by a rod to.

An adjustable centering device having a mandrel for setting circularsaws and holding them to turn readily over the anvil c is shown in Figs.3, at, and 5, the mandrel 0' being supported vertically by toggle-linksa", jointed, respectively, at their ends to the bed a and the mandrel.The inner ends of the links are secured to the bed by a thumb screw radapted to pinch them firmly, and thus hold them in any desiredposition.

A cup-shaped socket t is attached by its base to the mandrel with itsmouth upon a level with the top of the anvil, and a conical plug t isfitted to the mandrel and adapted to fit within the central aperture ofthe saw and extend within the socket t. The togglelinks being bothpivoted upon the same screw 1' at their inner ends, permit the freeadjustment of the mandrel to or from the anvil, as indicated by thedotted lines 8 in Fig. 4, as well as laterally in the directionsindicated by the dotted arrows a in the same figure. By such lateraladjustment of the mandrel the radius of the saw-blade may be adjustedThe center of the saw-blade s is shown in section in Fig. 5 to show theoperation of the conical plug 25 in centering the saw upon the mandrel,the edge of the socket 75 serving merely as the support of the plate,while the plug t and mandrel 1 hold it securely upon its center, so thatits periphery may be readily turned with the desired tooth beneath thehammer.

The hammer-head D is made of disk form and rotary upon a pivot D for thepurpose of conveniently varying the breadth of the hammer-face whichoperates upon the saw-tooth; but the character of the hammer-head formsno part of my present invention.

In Fig. 6 the anvil and disk are shown slightly enlarged, with asaw-plate s laid upon the anvil and bent by the hammer. The anvil isshown with bevels e of different lengths upon its several corners,bywhich the extent to which the tooth is bent by the blow of the hammermay be determined without varying the adjustment of the hammer. Thehammer helve is preferably so constructed that the curved edge of thedisk may always come in contact with the outer corner 6 of the bevelupon the anvil, and the diii'erent faces upon the edge of the disk arethus adapted to operate in bending teeth of different lengths withoutanyspecial adjustment.

In Fig. 7 is shown a side view of the anvil, with the numbers 16 to 12marked adjacent to the upper beveled corner and the numbers 9 to 1.1marked adjacent to the lower corner. Upon the opposite side of the anvilthe numbers 6 to 8 would be marked adjacent to one corner and thenumbers 3 to 5 marked adjacent to the other corner, and the bevels uponthe respective corners would be made of suit able width to suit teethvarying in one instance from 12 to 16 points in the inch, from 9 to 11.points upon another corner, from 6 to 8 upon another, and from 3 to 5upon another. B y thus constructing and marking the corners the operatormay be enabled to set the proper corner of the anvil in proximity to thegage c, and thus secure the desired results without trial.

My saw-set maymade of any size, and it is immaterial whether the trip Zbe operated by foot or hand power, as shown herein, or by any othersuitable means.

In actuating the hammer with the treadle u the operator may readilyacquire such dexterity that the alternate teeth of the saw may beshifted rapidly into the desired position. upon the anvil exactlybeneath the hammer, and the setting may thus be performed as quickly asthe treadle can be actuated.

It will be noticed that there are no adj 11stable gages upon my sawsetwhich require to be changed for setting teeth of dilferent lengths andpitches; but that the removable anvil may be readily removed byslackening IIO iii

the screw (2 to turn the proper corner of the anvil to suit the requiredbend in the tooth, and that the adjustment of the trip to or from thearm J then sufiices to fit the machine for immediate operation.

I am aware of the state of the art shown in United States Patents Nos.22,260, dated December 7, 1858, 24,408, dated June 12, 1859, 95,331,dated September 28, 1869, 135,752, dated February 11, 1873, 327,609,dated Octoher 6, 1885, and I hereby disclaim the said patents.

The construction of the tripping devices in my invention differsmaterially from those shown in the said patents, and no mandrel forholding circular saws upon the anvil of a saw-set has ever been mountedupon togglelinks like those shown in Figs and 5 of my drawings, althoughmandrels analogous to mine havebeen mounted upon afoot attached to thesaw-set to be adjusted to and from the anvil, as required.

Having thus set forth my invention, What I claim herein is 1. Asa-w'setcomprising the gage c, anvil e, pivot-ed hainnier-helve I, withhammer-head pressed toward the anvil by a spring, the lever J, projectedfrom the rear of the hammerhelve, and the trip Z, formed with slot at,fitted lnovably upon the pin m, and provided With adjusting set-screw sand spring 0, the whole arranged and operated as and for the purpose setforth.

2. A saw-set comprising the bed Ct, provided with fulcrum-bearing b,trip-bearing f, gage c, anvil e, and set-screw e for clamping the sameremovably in its place, the hammer-head D, the helve I, with the lever jprojected from the rear of the bearing 1), the spring q, and the trip Z,formed with slot 01, fitted movably upon the pin m, and provided withthe adjusting set-screw 3, spring 0, and hand-lever P, the Wholearranged and operated substantially as set forth.

3. A saw-set comprising the bed a, provided with fulcrumbearing b,trip-bearingf, gage c, anvil 6, having different bevels upon its fourcorners, numbered substantially as hereinset forth, and set-screw 6 forclamping the same removably in its place, the hammer-head D, the helveI, With the lever projected from the rear of the bearing Z), the springq, and thetrip 1, formed with slot at, fitted movably upon the pin on,and provided with the adjusting set-screw, spring, and hand-lever, thewhole arranged and operated substantially as set forth.

4. In a saw-set, the combination, with an anvil and a hammer-headvibrated to and from the same,-of a cei'itering device consisting in thetoggles '7", jointed together and to the bed of the sawset, and providedat their outer ends With the mandrel 9', the socket t, and the conicalplug 73, the Whole arranged and operated as and for the purpose setforth.

In testimony whereof I have here unto set my hand in the presence of twosubscribing wit nesses.

JAMES HILTON. \Vitnesses:

L. LEE, 'lnos. S. CRANE.

